Ask for recommendations: Ask friends, family, and your veterinarian for recommendations for a good dog trainer. Personal recommendations can be a great way
Observe a class: If possible, attend a training class or session before signing up. Observe how the trainer interacts with the dogs and the owners, and how the dogs respond to the training.
Discuss training methods: Make sure you feel comfortable with the training methods the trainer uses. Positive reinforcement methods are generally considered more effective and humane than punishment-based methods.
Consider experience: Look for a trainer who has experience working with dogs of your breed and age. A trainer who specializes in training puppies may not be the best fit for an adult dog with behavior issues.
Trust your gut: Finally, trust your instincts when choosing a trainer. If something doesn't feel right or you're not comfortable with the trainer, keep looking until you find someone who is a better fit for you and your dog.